Project 1 - Interfacing a 16*2 LCD with Arduino using I2C protocol

Project 1 - Interfacing a 16*2 LCD with Arduino using I2C protocol

Overview of the Project: 

In this project implementing the Code for “Interfacing a 16*2 LCD with two Arduino’s (one for Master and one for Slave) using Inter-Integrated Circuit (I2C) communication protocol” by sending the message to LCD using I2C communication protocol and display the message on LCD screen.

Program:

MASTER

#include   // header file to use LCD functions
#include   // header file to use I2C communication
LiquidCrystal lcd(12,11,5,4,3,2); // set pin for lcd
void setup()
{
lcd.begin(16,2);   // to enable lcd
Serial.begin(9600);   // to enable serial monitor
Wire.begin(8);   // to enable i2c communication
Wire.onReceive(display);   //receive data from master
}

void loop()
{

delay(30); // Wait for 1000 millisecond(s)


}
void display(int x)
{
int y=Wire.read();   // read value from master
Serial.println(y);   // print value in serial monitor
lcd.setCursor(0,0);  // set cursor first row and first column
lcd.print("the volt is");
lcd.print(y);  //print received data in lcd
delay(1000);
}

SLAVE:

#include  // header file
void setup()
{
Wire.begin();   // to enable i2c communication
pinMode(A2,INPUT);   // set A2 as input
}
void loop()
{
float x=analogRead(A2);   // get value from temperature sensor
float value=((x*5)/1024);   // convert adc value into voltage level and stored in it
signed int temp=((value-0.5)*100);//convert voltage level into temperature
Wire.beginTransmission(8);   // transmission begin
Wire.write(temp);   //send temperature value to slave
Wire.endTransmission();   // end transmission
delay(1000);
}

Circuit Diagram:

                

Components Used:

              

SCHEMATIC VIEW: